微细粒绢云母-石英分散聚沉行为研究.pdfVIP

第 卷第 期 40 3 非金属矿 Vol.40 No.3 年 月 2017 5 Non-Metallic Mines May, 2017 微细粒绢云母-石英分散聚沉行为研究 1,2 1,2* 1,2 1,2 1,2 1,2 朱兴月 钱玉鹏 贺壹城 秦煦坤 高惠民 任子杰 （1 武汉理工大学 资源与环境工程学院，湖北 武汉 430070 ；2 矿物资源加工与环境湖北省重点实验室，湖北 武汉 430070） 摘 要 通过沉降试验、表面电位测试和扫描电镜分析，系统研究了在酸性和碱性条件下，分散剂六偏磷酸钠和羧甲基纤维素对绢云母、石 英纯矿物和人工混合矿分散效果的影响。结果表明：矿物颗粒沉降行为受介质 pH 值的影响较大，当分散介质 pH 值为 3 和 pH 值为 12 时，颗粒极 易发生团聚；六偏磷酸钠通过降低颗粒表面电位，增大颗粒间的静电排斥作用，对绢云母和石英具有较好的分散效果。SEM 镜下观察显示，添加六 偏磷酸钠后，绢云母表面附着的细粒石英颗粒明显变少。 关键词 微细粒；绢云母；石英；分散行为 TQ028.4+2 A 1000-8098(2017)03-0075-04 中图分类号： 文献标识码： 文章编号 ： Study on Dispersion Behavior and Mechanism of the Micro-fine Sericite and Quartz Zhu Xingyue1,2 Qian Yupeng1,2* He Yicheng1,2 Qin Xukun1,2 Gao Huimin1,2 Ren Zijie1,2 (1 School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan, Hubei 430070; 2 Hubei Key Laboratory of Mineral Resources Processing and Environment, Wuhan, Hubei 430070) Abstract The effect on the dispersion behavior of micro-fine sericite and quartz was investigated with sodium hexametaphosphate (SHMP) and carboxymethyl cellulose (CMC) as dispersants. The sedimentation test, Zeta potential measurements and scanning electron microscope (SEM) analysis was introduced. The result indicates that the sedimentation behavior of mineral particles is obviously influenced by the pH value. The particle is agglomerated in pH=3 and pH=12 slurry. The Zeta potentials of sericite and quartz is decreased by absorbing SHMP. The electrostatic re